我收到了错误：“UnsupportedOperation: read”

Question

import pickle

#writing into the file

f = open("essay1.txt","ab+")

list1 = ["Aditya","Arvind","Kunal","Naman","Samantha"]

list2 = ["17","23","12","14","34"]

zipfile = zip(list1,list2)

print(zipfile)

pickle.dump(zipfile,f)

f.close()

#opening the file to read it 

f = open("essay1","ab")

zipfile = pickle.load(f)

f.close()

产出如下：

runfile('E:/Aditya Singh/Aditya Singh/untitled3.py', wdir='E:/Aditya Singh/Aditya Singh')
<zip object at 0x0000000008293BC8>
Traceback (most recent call last):

  File "E:\Aditya Singh\Aditya Singh\untitled3.py", line 21, in <module>
    zipfile = pickle.load(f)

UnsupportedOperation: read

Answer 1

您在试图打开文件的行中忘记了文件扩展名.txt，也忘记了以附加模式打开文件，这就是为什么返回的对象没有read或readline方法(pickle.load需要)。我还建议使用with keyword，而不是手动关闭文件。

import pickle

#writing into the file

with open("essay1.txt","ab+") as f:
    list1 = ["Aditya","Arvind","Kunal","Naman","Samantha"]
    list2 = ["17","23","12","14","34"]
    zipfile = zip(list1,list2)
    print(zipfile)
    pickle.dump(zipfile,f)

#opening the file to read it
with open("essay1.txt", "rb") as f:
    zipfile = pickle.load(f)

for item in zipfile:
    print(item)

输出：

<zip object at 0x7fa6cb30e3c0>
('Aditya', '17')
('Arvind', '23')
('Kunal', '12')
('Naman', '14')
('Samantha', '34')

Answer 2

你有essay1文件吗？还是短文？

这是试图打开没有扩展。

f = open("essay1","ab")

所以读不懂。

Answer 3

您的代码有两个问题：

• 您打开文件是为了写而不是读。
• 您使用不同的文件名进行读写。

下面是一个有效的版本：

import pickle

#writing into the file
f = open("essay1.txt","wb")
list1 = ["Aditya","Arvind","Kunal","Naman","Samantha"]
list2 = ["17","23","12","14","34"]
zipfile = zip(list1,list2)
print(zipfile)
pickle.dump(zipfile,f)
f.close()

#opening the file to read it 

f = open("essay1.txt","rb")
zipfile = pickle.load(f)
print(zipfile)
f.close()